CVE-2026-56403

—

CVSS 3.1

6.9 medium

EPSS

<1%p4

Published

Jun 21, 2026 (Jun 21, 2026)

Modified

Jun 23, 2026

Description

libexpat before 2.8.2 has an integer overflow in storeAtts.

Vendors: libexpat project
Products: libexpat
Weakness: CWE-190
Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L

NVD CVE.org GitHub PoCs EPSS (0.1%)

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